Book digitized by Google and uploaded to the Internet Archive by user tpb.
Introductory. -- Investigations in 1666. -- In 1679. -- In 1684. -- Preparation of the Principia, 1685-1687. -- Analysis of the Principia. -- Investigations from 1687 to 1726. -- Appendices. a. Correspondence between Hooke and Newton, 1678-1680. b. Correspondence between Halley and Newton, 1686-1687. c. On the correspondence concerning the production of the 2d edition of the Principia. d. On the correspondence concerning the production of the 3d edition of the Principia